Observation of $\bar{B}^0\to D^0π^0$ and $\bar{B}^0\to D^{*0}π^0$

Details Observation of $\bar{B}^0\to D^0π^0$ and $\bar{B}^0\to D^{*0}π^0$ Observation of $\bar{B}^0\to D^0π^0$ and $\bar{B}^0\to D^{*0}π^0$

2001-10-24

arxiv.org/abs/hep-ex/0110055v2

Phys.Rev.Lett.88:062001,2002

Physics

High Energy Physics

High Energy Physics - Experiment

10 pages postscript, also available through http://w4.lns.cornell.edu/public/CLNS, to appear in PRL

Scientific paper

10.1103/PhysRevLett.88.062001

We have studied the color-suppressed hadronic decays of neutral B mesons into the final states D(*)0 pi0. Using 9.67 million B-pairs collected with the CLEO detector, we observe the decays B0bar -> D0 pi0 and B0bar -> D*0 pi0 with the branching fractions BR(B0bar -> D0 pi0) = (2.74 -0.32 +0.36 +-0.55) 10^{-4} and BR(B0bar -> D*0 pi0) = (2.20 -0.52 +0.59 +-0.79) 10^{-4}. The first error is statistical and the second systematic. The statistical significance of the D0 pi0 signal is 12.1 sigma (5.9 sigma for D*0 pi0). Utilizing the B0bar -> D(*)0 pi0 branching fractions we determine the strong phases delta_I between isospin 1/2 and 3/2 amplitudes in the D pi and D* pi final states to be cos delta_I = 0.89 +- 0.08 and cos delta_I = 0.89 +- 0.08, respectively.

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